Packing.



UNITED STATES PATENT OFFICE.4

STEWART HOLMES, OE NEW YORK, N. Y.

EAGKING.

To a/ZZ whom it may concern.-

Be it known that I, STEWART HOLMES, a citizen of the United States, anda resident of the city of New 'York, borough of Brooklyn, in the countyof Kings and State of New York, have invented a new and ImprovedPacking, lof which the following is a full, clear, and exactdescription.

The object of the invention is to provide a new and improved packing forpistons and the like which is sim le and durable in construction andvery e ective in Operation.

The invention consists of novel features and parts and combinations ofthe same, which will be more fully described hereinafter and thenpointed out in the claims.

A practical embodiment of the invention is represented in theaccompanying drawings, forming a part of this; specification, in whichsimilar characters of reference indicate corresponding parts in both theviews.

.Figure 1 is a plan view of the improvement as applied to a Asteam-pumppiston, parts being shown in section on the line 1 1 O Fig. 2; and Fig.2 is a'transverse section of the same on the line 2 2 of Fig. 1.

The acking-ring A is loosely fitted on the bodyV of the piston, and theinner vend of the said packin mi@ A abuts against an annular shoulderyfijfiteglral on the body B, andthe outer end o'f t e said acking-ring Ais en aged by a washer C, hel in lace by a nut screw' on the outer en ofthe central piston-r plainly indicated in Fig; '1. he ackin'g-ring diaOna y-extending wa s beveled and enga d by the sidesof a spreader-barF,pproffera ly made triangular in cross-section, as plainly indicated inFig. 2, the base of the spreder-bar being engaged and pressed outward bya spring G or a similar means held on a, seat A, formed integrally Onthe inside of the packing-ring A at the split A.

By reference A is provided with a split A', having its ai rig; 2 itwarb@ Seen-nia y the seat A2 is s lit in the direction of the split A',and instea' of the spring G above mentioned liners or like devices maybe employd for forcing the spreader-bar' F out ward, with a view to openthe split ring A, so as to firmly engage the inner surface of thecylinder in which the piston is used. Now in Specicaton of LettersPatent. Y Application filed January 19,1907. Serial No 353,073.

Patented April 9, 1907.

order to accommodate the seat A2 the body B is iiattened, as at B2, (seeFig. 2,) it being expressly understood that the seat A2 is an integralpart of the ring A and supports the spring G or other means for` forcingthe spreader-bar F outward.

The packing described is very sim le and durable in construction, can becheap y manufactured, and readily applied.

By constructing the packing inthe manner above set forth, and shown inthe draw' ings, ,it is evident that the Outer surface of the ring snuglyfits the inner surface of the cylinder in which the piston is used, thering being spread apart with suflicient force by the spreader-bar F soas to prevent all leakage from one side of the piston to the other.

The ring A is preferably made Of steel, while the sp`readerbar F is madeof softer metal, preferably brass, to revent the outer corner of the sreader-bar om cutting into the surface of t e cylinder.

Having thus described my invention, I claim as new and desire .to secureby Letters Patent 1. A packing for pistons and the like coniprising aring having a diagonal split, the walls of the split being beveledinwardly and said ring being rovided with an integral seat on the insideo thering at cach side of the split, and extending in the direction ofthe' the said scat and engaging the base of thc spreader-bar to forcethe latter Outward.

In testimony whereof I have'signed my name to this specification in thepresence of two subscribing witnesses.

STEWART HOLMES. Witnesses:

Timo. G. HosTER, vEvERARD B. MARSHALL)v lOO

